V47BD-3C Johnson Controls MODULATING Valve

Overview

The Johnson Controls V47BD-3C is a high-performance, 1-inch temperature-actuated modulating water regulating valve designed for precise cooling and heating control in HVACR and industrial hydronic systems. This direct-acting valve automatically regulates the flow of water or glycol solutions to maintain a desired temperature, opening smoothly upon a rise in temperature at the sensing bulb. Engineered with a pressure-balanced design, it resists sudden or gradual fluctuations in supply pressure and features an anti-hammer geometry to protect equipment and optimize efficiency.

Features

• Pressure-Balanced Architecture: Proportioned synthetic rubber sealing diaphragms balance the valve against water pressure changes and protect against high surge pressures.
• No-Slide Component Design: Eliminates close-fitting or sliding parts within the water passages to prevent fouling from sedimentation, ensuring free movement and smooth modulation.
• Isolated Range Spring: Keeps the control spring completely out of contact with the cooling fluid to eliminate corrosion and chemical degradation.
• Anti-Hammer Geometry: Advanced valve design minimizes internal chatter and hydraulic shock/water hammer.
• Easy Manual Flushing: Allows for simple manual flushing of the internal passages if required during maintenance.
• Robust Materials: Constructed with a heavy-duty body and corrosion-resistant internal metal components coming into contact with the fluid.

Specifications

• Manufacturer Part Number: V47BD-3C
• Connection Size: 1 Inch NPT / Threaded
• Temperature Control Range: 160 to 230 °F (Heating / Open on Temperature Increase)
• Sensing Bulb Dimensions: 11/16 Inch Diameter x 6 Inch Length
• Capillary Length: 10 Feet (Armored Capillary)
• Maximum Supply Water Pressure: 150 psig (1,034 kPa)
• Maximum Water Temperature: 170°F (77°C)
• Maximum Bulb Temperature: 20°F above the maximum range limit
• Internal Bypass: Equipped with a 0.093-inch bypass orifice capacity

Applications

• Heat Exchangers: Stabilizes equipment temperatures by modulating coolant flow in response to heat load changes.
• Air Compressors: Prevents operational overheating by precisely managing the cooling water supply.
• Hydraulic Systems: Regulates water-side flow to hold industrial hydraulic oil at optimal temperatures.
• Industrial Machinery: Controls coolant lines on demanding equipment, such as industrial printing machinery, to maintain proper fluid and material viscosity.